mvc4 web-api 与unity搭建接口

对于接口重要的应该是 功能实现，合法性验证,性能监控，日志等模块

通过unity aop功能可以实现统一的日志模块和性能监控。

1、新建mvc4 webapi项目 nuget添加 unity 3.0+版本 和 unity.Interception

2、重置mvc4 和webapi 的ioc容器：

public class UnityDependencyResolver : System.Web.Mvc.IDependencyResolver, System.Web.Http.Dependencies.IDependencyResolver
    {
        private readonly IUnityContainer _unityContainer;

        public UnityDependencyResolver(IUnityContainer container)
        {
            this._unityContainer = container;
        }

        public object GetService(Type serviceType)
        {
            try
            {
                return _unityContainer.Resolve(serviceType);
            }
            catch
            {
                return null;
            }
        }

        public IEnumerable<object> GetServices(Type serviceType)
        {
            try
            {
                return _unityContainer.ResolveAll(serviceType);
            }
            catch
            {
                return new List<object>();
            }
        }

        public IDependencyScope BeginScope()
        {
            return this;
        }

        public void Dispose()
        {
        }
    }

 public class UnityConfig
    {
        public static void Register()
        {
            IUnityContainer container = new UnityContainer();
            container.AddNewExtension<Interception>(); //这里最重要
            container.LoadConfiguration();
            var unity = new UnityDependencyResolver(container);
            //设置mvc的依赖管理
            DependencyResolver.SetResolver(unity);
            //设置mvc的依赖管理
            GlobalConfiguration.Configuration.DependencyResolver = unity;
        }
    }

3、在Global.asax 里调用：

  protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();

            WebApiConfig.Register(GlobalConfiguration.Configuration);
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);
            UnityConfig.Register();
        }

4、最后关于 unity的配置

 <configSections>
     <section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection,Microsoft.Practices.Unity.Configuration" />
  </configSections> <!-- 千万别忘了这里这是实现aop扩展 -->
<unity xmlns="http://schemas.microsoft.com/practices/2010/unity">
    <sectionExtension type="Microsoft.Practices.Unity.InterceptionExtension.Configuration.InterceptionConfigurationExtension,Microsoft.Practices.Unity.Interception.Configuration" />
    <typeAliases>
      <!-- Lifetime manager types -->
      <typeAlias alias="singleton" type="Microsoft.Practices.Unity.ContainerControlledLifetimeManager,Microsoft.Practices.Unity" />
      <typeAlias alias="external" type="Microsoft.Practices.Unity.ExternallyControlledLifetimeManager,Microsoft.Practices.Unity" />
      <typeAlias alias="perThread" type="Microsoft.Practices.Unity.PerThreadLifetimeManager,Microsoft.Practices.Unity" />

      <!-- User-defined type aliases -->
      <typeAlias alias="IBMapServer" type="CRM.Phone.Server.IBMapServer,CRM.Phone.Server" />
      <typeAlias alias="BMapServer" type="CRM.Phone.Server.BMapServer,CRM.Phone.Server" />
      <typeAlias alias="LoggingInterceptionBehavior" type="CRM.Phone.Interface.LoggingInterceptionBehavior,CRM.Phone.Interface" />
    </typeAliases>
    <container>
      <types>
        <!--<type type="IBMapServer" mapTo="BMapServer">
          <lifetime type="singleton" />
        </type>-->
      </types>
      <register type="IBMapServer" mapTo="BMapServer">
        <interceptor type="InterfaceInterceptor"/>
        <interceptionBehavior type="LoggingInterceptionBehavior"/>
      </register>
    </container>
  </unity>

这里以IBMapserver 接口为例 对IMBapserver 中所有的方法进行拦截。

5、在Controller里使用注入对象 使用Dependecy标签:

 public class BMapController : ApiController
    {

        [Dependency]
        public IBMapServer MapServer { get; set; }

        public Point GetPointByid(int id)
        {
            return MapServer.getPoint(id); 
        }
   }

6、如果发现注入对象为空，而且没有报错，请一定注意文中 红色的部分

7、最后贴一下 关于Logging处理代码